So, I was fighting a battle, winning against dragons 2* and 3* fully trained with no difficulty, then wave 2 & I come across a pair of 1* Boltstampers and they take ages to defeat… I checked their’s status and they had more than 2000 HP, which is much more than what the Gutsy Boltstampers, 2* hybrid offspring of Skill + Rumblehorn, according to my breedery’s data for a fully trained Boltstamper. Something smells fishy in here.

This happened again with 2* Thunderdrums on level 28/46, Wild Woodland. While I had no real issue defeatin them, it only took a few moments, I find that those dragons’ HP are also wrong. In fact, they are almost double the HP that breedery dictates a fully trained Tectonic Thunderdrum can have.

This is normal for Story Mode. A few whales here have posted screenshots of dragons with ~3k power per dragon, and I don’t even remember the hp.

The trick, though, is that only their HP scales. I was originally worried that all of their stats scale, but the reality that a couple of people helped me realize - is that their unknown attack/defense values are in fact tied to their star-training. Obviously in your case the Thunderdrums were “maxed out” and then scaled, but you’ll later see 1400 4s dragons that are not 4s-trained. Thus is the game’s attempt at keeping content challenging, progressive yet accesible.